In triaging PulseNet clusters, which item is considered?

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Triaging PulseNet clusters hinges on finding a plausible link between human cases and known non-human sources. PulseNet collects DNA fingerprint patterns from human clinical isolates, while VetNet extends that network to animal, food, and environmental isolates. If a cluster of human cases shares a pattern with non-human isolates, investigators gain a strong cue that there is a real exposure source and can prioritize follow-up steps like targeted interviews, environmental sampling, and traceback to identify the contamination source. This cross-species match is the most actionable signal for triage because it directly links the human cluster to a potential source, helping separate clusters that deserve in-depth investigation from those that don’t. Pathogen type or the timing and location of cases remain important for a full investigation, but the key triage signal described here is the match to non-human isolates in PulseNet or VetNet.